Apparatus for casting cementitious material.



G. ATTERBURY.

APPARATUS FOR CASTING CEMENTITIOUS MATERIAL. APPLICATION FILED JUNE 8. 1918.

Patented Feb. 11, 1919.

. cast in situ is impossible. In my improved A'PPTUS FOB CASTING CEMENTITIOUS MATERIAL.

Specification of Letters Patent.

Patented lteb. 111, 1919.

Application filed June 8, 1918. Serial No. 238,989.

To all whom it may concern:

Be it known that I, GRosvnNoR Arran- BURY, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Apparatus for Casting Cementitious Material, of which the following is a description.

My invention relates to apparatus for east ing hollow or cored cementitious or concrete blocks, forms, shapes and objects, and particularly to means for shaking and compacting the material in the molds.

It has heretofore'been customary to shake or vibrate the molds in order to compact the material, but where the molds are large, this is difficult and requires complicated and expensive apparatus, and in the case of forms apparatus I obviate the necessity of vibrating the mold as a unit by providing means for vibrating the cores formin a part thereof. My invention therefore brlefly described may be .said to consist of a core for use in casting cementitious forms and objects in combination with means for vibrating or shaking the core independently of the mold or form in which it is used.

In the accompanying rawing forming part of this speclfication, I have lllustrated the preferred embodimentof my invention.

Figure 1 is a horizontal sectional view of a mold showing a core in position with means for vibrating or shaking the core independent of the mold.

Fig. 2 is a view taken from the right of Fig. 1, parts being shown in vertical section;

Fig. 3 is a view similar to Fig.1, but partly broken away to show a different form of vibratory core.

Referring more particularly to Figs. 1 and 2, 1 is a mold containing unset concrete 2. A core 3 is arranged within mold 1, having rods such as 4 extending from its ends through apertures in the mold. Springs, such as 5, are provided in the said apertures, whereby the rods 4 and core 3 are held normally 1n a given central position, but are permitted to vlbrate independently of the mold. inks 6 connect the rods 4 with pins 7 at the ends of a shaft 8 which iscarried by standards 10 and rotated by suitable means such as a belt (not shown) running on the pulley 9 The pins 7 are set eccentrically to the center of the shaft 8 as shown in Fig. 2, whereby said pins reciprocate the links 6 as the shaft 8 revolves, thus vibrating or shaking the core 3.

Referring to Fig. 3, I have shown therein a hollow core 11, within which are boxes such as 12, containing electro-magnets 13 arranged to attract armatures 14 on the ends of pivoted arms 15. At the ends of the arms 15, opposite the armatures, are hammers 16v arrangedto strike the outer shell of the core 11 when arms 15 are swung in one direction by the attraction between the magnets and their respective armatures. Springs 17 are provided within box 12 for moving arms 15 in the direction opposite to that in which they are moved by the magnets. Current for exciting the magnets is introduced through leads such as 18. It will be understood that suitable means- (not shown) of a kind in common use will be provided for interrupting the current in leads 18 when the armatures have been attracted by the magnets to one end of their strokes So that springs 17 may come into play. Stops 19 are provided to prevent the s rings 17 from swinging the armatures'too ar away from the magnets. It will be seen that a continuous vibration of the shell of core 11 is produced as long as current is supplied to leads 18.

While l[ have illustrated and described only two mechanisms or arrangements for effecting the vibration of the core, it is obvious that modifications thereof may be employed, and I desire protection for all such modifications as come within the scope of my claims.

Having now described I claim is: g

1. An apparatus for casting apertured objects of cementitious material comprising a fixed mold, a core in said mold, and means for vibrating said core relatively to said mold.

2. Apparatus of the kind described comprising a core, and means for vibrating said core in a direction transverse to its axis.

3. A core for use in castin cementitious material in combination wit means disposed inside the core for vibrating or shakmg the same.

GROSV-ENOR ATTERBY.

my invention, what 

